Since it has 2 knobs, you probably have a Lufkin 901 A, a very nice planer gage. With the planer sitting on the long edge, the vertical knob is for fine adjustment, the knob on the angle is the locking knob. Here are the instructions that came with mine.

And the beloved gage.

When Lufkin was bought out by Pratt and Whitney, they continued the 901 A, but the sliding surfaces are a little different.

ome

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Since it has 2 knobs, you probably have a Lufkin 901 A, a very nice planer gage. With the planer sitting on the long edge, the vertical knob is for fine adjustment, the knob on the angle is the locking knob. Here are the instructions that came with mine.

And the beloved gage.

When Lufkin was bought out by Pratt and Whitney, they continued the 901 A, but the sliding surfaces are a little different.

Thank you very much, if i knew how to upload a photo i would.. There is a small metal piece connecting the two knobs, one knob is on an angle and the other knob is vertical, with the planer gage positioned as in your photo You are correct, it is a fully equipped Lufkin 901A planer gage. It needs some tlc because it was very hard to initially slide the gage along the way. Is the straight piece a scriber?

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Thank you very much, if i knew how to upload a photo i would.. There is a small metal piece connecting the two knobs, one knob is on an angle and the other knob is vertical, with the planer gage positioned as in your photo You are correct, it is a fully equipped Lufkin 901A planer gage. It needs some tlc because it was very hard to initially slide the gage along the way. Is the straight piece a scriber?

On my gage, if you have the fine adjust backed out too far, the locking knob stud (the upper pivot with the small flat bar attaching to the other knob) will hit the top of the inside and not be able to lock. The fine adjustment rod has about 0.30" of travel, but only the last 0.15" is really usable.

The straight piece is a scriber.

I also have a couple of attachments that allow me to use a dial test indicator with the gage. The upper one is a modified Federal, and the lower is an unmodified Starrett.

ome

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On my gage, if you have the fine adjust backed out too far, the locking knob stud (the upper pivot with the small flat bar attaching to the other knob) will hit the top of the inside and not be able to lock. The fine adjustment rod has about 0.30" of travel, but only the last 0.15" is really usable.

The straight piece is a scriber.

I also have a couple of attachments that allow me to use a dial test indicator with the gage. The upper one is a modified Federal, and the lower is an unmodified Starrett.

looking at the gage closely, i noticed that when i opened the fine adjustment knob, a small spring became unseated in its counterrbore, i must be able to get it seated again, so that the lock will work.

Thanks,

Jon

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I did like my Brown & Sharpe 625 planer gage until I saw this thread! Anyone have a Lufkin available and willing to take my 625 in trade?
If not, I guess I'll use it to set the tool height on my lathe...
Maurice